/*
 * Copyright (C) 2008-2019 TrinityCore <https://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "WorldPacket.h"
#include "BattlePetMgr.h"
#include "Common.h"
#include "Creature.h"
#include "DatabaseEnv.h"
#include "DB2Stores.h"
#include "Item.h"
#include "ItemPackets.h"
#include "Log.h"
#include "NPCPackets.h"
#include "ObjectMgr.h"
#include "Opcodes.h"
#include "Player.h"
#include "WorldSession.h"

void WorldSession::HandleSplitItemOpcode(WorldPackets::Item::SplitItem& splitItem)
{
    if (!splitItem.Inv.Items.empty())
    {
        TC_LOG_ERROR("network", "HandleSplitItemOpcode - Invalid ItemCount (" SZFMTD ")", splitItem.Inv.Items.size());
        return;
    }

    TC_LOG_DEBUG("network", "HandleSplitItemOpcode: receive FromPackSlot: %u, FromSlot: %u, ToPackSlot: %u, ToSlot: %u, Quantity: %u",
        splitItem.FromPackSlot, splitItem.FromSlot, splitItem.ToPackSlot, splitItem.ToSlot, splitItem.Quantity);

    uint16 src = ((splitItem.FromPackSlot << 8) | splitItem.FromSlot);
    uint16 dst = ((splitItem.ToPackSlot << 8) | splitItem.ToSlot);

    if (src == dst)
        return;

    // check count - if zero it's fake packet
    if (!splitItem.Quantity)
        return;

    if (!_player->IsValidPos(splitItem.FromPackSlot, splitItem.FromSlot, true))
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND);
        return;
    }

    if (!_player->IsValidPos(splitItem.ToPackSlot, splitItem.ToSlot, false)) // can be autostore pos
    {
        _player->SendEquipError(EQUIP_ERR_WRONG_SLOT);
        return;
    }

    _player->SplitItem(src, dst, splitItem.Quantity);
}

void WorldSession::HandleSwapInvItemOpcode(WorldPackets::Item::SwapInvItem& swapInvItem)
{
    if (swapInvItem.Inv.Items.size() != 2)
    {
        TC_LOG_ERROR("network", "HandleSwapInvItemOpcode - Invalid itemCount (" SZFMTD ")", swapInvItem.Inv.Items.size());
        return;
    }

    TC_LOG_DEBUG("network", "HandleSwapInvItemOpcode: receive Slot1: %u, Slot2: %u",
        swapInvItem.Slot1, swapInvItem.Slot2);

    // prevent attempt swap same item to current position generated by client at special checting sequence
    if (swapInvItem.Slot1 == swapInvItem.Slot2)
        return;

    if (!_player->IsValidPos(INVENTORY_SLOT_BAG_0, swapInvItem.Slot1, true))
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND);
        return;
    }

    if (!_player->IsValidPos(INVENTORY_SLOT_BAG_0, swapInvItem.Slot2, true))
    {
        _player->SendEquipError(EQUIP_ERR_WRONG_SLOT);
        return;
    }

    if (_player->IsBankPos(INVENTORY_SLOT_BAG_0, swapInvItem.Slot1) && !CanUseBank())
    {
        TC_LOG_DEBUG("network", "HandleSwapInvItemOpcode - Unit (%s) not found or you can't interact with him.", m_currentBankerGUID.ToString().c_str());
        return;
    }

    if (_player->IsBankPos(INVENTORY_SLOT_BAG_0, swapInvItem.Slot2) && !CanUseBank())
    {
        TC_LOG_DEBUG("network", "HandleSwapInvItemOpcode - Unit (%s) not found or you can't interact with him.", m_currentBankerGUID.ToString().c_str());
        return;
    }

    uint16 src = ((INVENTORY_SLOT_BAG_0 << 8) | swapInvItem.Slot1);
    uint16 dst = ((INVENTORY_SLOT_BAG_0 << 8) | swapInvItem.Slot2);

    _player->SwapItem(src, dst);
}

void WorldSession::HandleAutoEquipItemSlotOpcode(WorldPackets::Item::AutoEquipItemSlot& autoEquipItemSlot)
{
    // cheating attempt, client should never send opcode in that case
    if (autoEquipItemSlot.Inv.Items.size() != 1 || !Player::IsEquipmentPos(INVENTORY_SLOT_BAG_0, autoEquipItemSlot.ItemDstSlot))
        return;

    Item* item = _player->GetItemByGuid(autoEquipItemSlot.Item);
    uint16 dstPos = autoEquipItemSlot.ItemDstSlot | (INVENTORY_SLOT_BAG_0 << 8);
    uint16 srcPos = autoEquipItemSlot.Inv.Items[0].Slot | (uint32(autoEquipItemSlot.Inv.Items[0].ContainerSlot) << 8);

    if (!item || item->GetPos() != srcPos || srcPos == dstPos)
        return;

    _player->SwapItem(srcPos, dstPos);
}

void WorldSession::HandleSwapItem(WorldPackets::Item::SwapItem& swapItem)
{
    if (swapItem.Inv.Items.size() != 2)
    {
        TC_LOG_ERROR("network", "HandleSwapItem - Invalid itemCount (" SZFMTD ")", swapItem.Inv.Items.size());
        return;
    }

    TC_LOG_DEBUG("network", "HandleSwapItem: receive ContainerSlotA: %u, SlotA: %u, ContainerSlotB: %u, SlotB: %u",
        swapItem.ContainerSlotA, swapItem.SlotA, swapItem.ContainerSlotB, swapItem.SlotB);

    uint16 src = ((swapItem.ContainerSlotA << 8) | swapItem.SlotA);
    uint16 dst = ((swapItem.ContainerSlotB << 8) | swapItem.SlotB);

    // prevent attempt swap same item to current position generated by client at special checting sequence
    if (src == dst)
        return;

    if (!_player->IsValidPos(swapItem.ContainerSlotA, swapItem.SlotA, true))
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND);
        return;
    }

    if (!_player->IsValidPos(swapItem.ContainerSlotB, swapItem.SlotB, true))
    {
        _player->SendEquipError(EQUIP_ERR_WRONG_SLOT);
        return;
    }

    if (_player->IsBankPos(swapItem.ContainerSlotA, swapItem.SlotA) && !CanUseBank())
    {
        TC_LOG_DEBUG("network", "HandleSwapItem - Unit (%s) not found or you can't interact with him.", m_currentBankerGUID.ToString().c_str());
        return;
    }

    if (_player->IsBankPos(swapItem.ContainerSlotB, swapItem.SlotB) && !CanUseBank())
    {
        TC_LOG_DEBUG("network", "HandleSwapItem - Unit (%s) not found or you can't interact with him.", m_currentBankerGUID.ToString().c_str());
        return;
    }

    _player->SwapItem(src, dst);
}

void WorldSession::HandleAutoEquipItemOpcode(WorldPackets::Item::AutoEquipItem& autoEquipItem)
{
    if (autoEquipItem.Inv.Items.size() != 1)
    {
        TC_LOG_ERROR("network", "HandleAutoEquipItemOpcode - Invalid itemCount (" SZFMTD ")", autoEquipItem.Inv.Items.size());
        return;
    }

    TC_LOG_DEBUG("network", "HandleAutoEquipItemOpcode: receive PackSlot: %u, Slot: %u",
        autoEquipItem.PackSlot, autoEquipItem.Slot);

    Item* srcItem  = _player->GetItemByPos(autoEquipItem.PackSlot, autoEquipItem.Slot);
    if (!srcItem)
        return;                                         // only at cheat

    uint16 dest;
    InventoryResult msg = _player->CanEquipItem(NULL_SLOT, dest, srcItem, !srcItem->IsBag());
    if (msg != EQUIP_ERR_OK)
    {
        _player->SendEquipError(msg, srcItem);
        return;
    }

    uint16 src = srcItem->GetPos();
    if (dest == src)                                    // prevent equip in same slot, only at cheat
        return;

    Item* dstItem = _player->GetItemByPos(dest);
    if (!dstItem)                                      // empty slot, simple case
    {
        if (!srcItem->GetChildItem().IsEmpty())
        {
            InventoryResult childEquipResult = _player->CanEquipChildItem(srcItem);
            if (childEquipResult != EQUIP_ERR_OK)
            {
                _player->SendEquipError(msg, srcItem);
                return;
            }
        }

        _player->RemoveItem(autoEquipItem.PackSlot, autoEquipItem.Slot, true);
        _player->EquipItem(dest, srcItem, true);
        if (!srcItem->GetChildItem().IsEmpty())
            _player->EquipChildItem(autoEquipItem.PackSlot, autoEquipItem.Slot, srcItem);

        _player->AutoUnequipOffhandIfNeed();
    }
    else                                                    // have currently equipped item, not simple case
    {
        uint8 dstbag = dstItem->GetBagSlot();
        uint8 dstslot = dstItem->GetSlot();

        msg = _player->CanUnequipItem(dest, !srcItem->IsBag());
        if (msg != EQUIP_ERR_OK)
        {
            _player->SendEquipError(msg, dstItem);
            return;
        }

        if (!dstItem->HasFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_CHILD))
        {
            // check dest->src move possibility
            ItemPosCountVec sSrc;
            uint16 eSrc = 0;
            if (_player->IsInventoryPos(src))
            {
                msg = _player->CanStoreItem(autoEquipItem.PackSlot, autoEquipItem.Slot, sSrc, dstItem, true);
                if (msg != EQUIP_ERR_OK)
                    msg = _player->CanStoreItem(autoEquipItem.PackSlot, NULL_SLOT, sSrc, dstItem, true);
                if (msg != EQUIP_ERR_OK)
                    msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, sSrc, dstItem, true);
            }
            else if (_player->IsBankPos(src))
            {
                msg = _player->CanBankItem(autoEquipItem.PackSlot, autoEquipItem.Slot, sSrc, dstItem, true);
                if (msg != EQUIP_ERR_OK)
                    msg = _player->CanBankItem(autoEquipItem.PackSlot, NULL_SLOT, sSrc, dstItem, true);
                if (msg != EQUIP_ERR_OK)
                    msg = _player->CanBankItem(NULL_BAG, NULL_SLOT, sSrc, dstItem, true);
            }
            else if (_player->IsEquipmentPos(src))
            {
                msg = _player->CanEquipItem(autoEquipItem.Slot, eSrc, dstItem, true);
                if (msg == EQUIP_ERR_OK)
                    msg = _player->CanUnequipItem(eSrc, true);
            }

            if (msg == EQUIP_ERR_OK && Player::IsEquipmentPos(dest) && !srcItem->GetChildItem().IsEmpty())
                msg = _player->CanEquipChildItem(srcItem);

            if (msg != EQUIP_ERR_OK)
            {
                _player->SendEquipError(msg, dstItem, srcItem);
                return;
            }

            // now do moves, remove...
            _player->RemoveItem(dstbag, dstslot, false);
            _player->RemoveItem(autoEquipItem.PackSlot, autoEquipItem.Slot, false);

            // add to dest
            _player->EquipItem(dest, srcItem, true);

            // add to src
            if (_player->IsInventoryPos(src))
                _player->StoreItem(sSrc, dstItem, true);
            else if (_player->IsBankPos(src))
                _player->BankItem(sSrc, dstItem, true);
            else if (_player->IsEquipmentPos(src))
                _player->EquipItem(eSrc, dstItem, true);

            if (Player::IsEquipmentPos(dest) && !srcItem->GetChildItem().IsEmpty())
                _player->EquipChildItem(autoEquipItem.PackSlot, autoEquipItem.Slot, srcItem);
        }
        else
        {
            if (Item* parentItem = _player->GetItemByGuid(dstItem->GetGuidValue(ITEM_FIELD_CREATOR)))
            {
                if (Player::IsEquipmentPos(dest))
                {
                    _player->AutoUnequipChildItem(parentItem);
                    // dest is now empty
                    _player->SwapItem(src, dest);
                    // src is now empty
                    _player->SwapItem(parentItem->GetPos(), src);
                }
            }
        }

        _player->AutoUnequipOffhandIfNeed();

        // if inventory item was moved, check if we can remove dependent auras, because they were not removed in Player::RemoveItem (update was set to false)
        // do this after swaps are done, we pass nullptr because both weapons could be swapped and none of them should be ignored
        if ((autoEquipItem.PackSlot == INVENTORY_SLOT_BAG_0 && autoEquipItem.Slot < INVENTORY_SLOT_BAG_END) || (dstbag == INVENTORY_SLOT_BAG_0 && dstslot < INVENTORY_SLOT_BAG_END))
            _player->ApplyItemDependentAuras((Item*)nullptr, false);
    }
}

void WorldSession::HandleDestroyItemOpcode(WorldPackets::Item::DestroyItem& destroyItem)
{
    TC_LOG_DEBUG("network", "HandleDestroyItemOpcode: receive ContainerId: %u, SlotNum: %u, Count: %u",
        destroyItem.ContainerId, destroyItem.SlotNum, destroyItem.Count);

    uint16 pos = (destroyItem.ContainerId << 8) | destroyItem.SlotNum;

    // prevent drop unequipable items (in combat, for example) and non-empty bags
    if (_player->IsEquipmentPos(pos) || _player->IsBagPos(pos))
    {
        InventoryResult msg = _player->CanUnequipItem(pos, false);
        if (msg != EQUIP_ERR_OK)
        {
            _player->SendEquipError(msg, _player->GetItemByPos(pos));
            return;
        }
    }

    Item* item  = _player->GetItemByPos(destroyItem.ContainerId, destroyItem.SlotNum);
    if (!item)
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND);
        return;
    }

    if (item->GetTemplate()->GetFlags() & ITEM_FLAG_NO_USER_DESTROY)
    {
        _player->SendEquipError(EQUIP_ERR_DROP_BOUND_ITEM, NULL, NULL);
        return;
    }

    if (destroyItem.Count)
    {
        uint32 i_count = destroyItem.Count;
        _player->DestroyItemCount(item, i_count, true);
    }
    else
        _player->DestroyItem(destroyItem.ContainerId, destroyItem.SlotNum, true);
}

void WorldSession::HandleReadItem(WorldPackets::Item::ReadItem& readItem)
{
    Item* item = _player->GetItemByPos(readItem.PackSlot, readItem.Slot);
    if (item && item->GetTemplate()->GetPageText())
    {
        InventoryResult msg = _player->CanUseItem(item);
        if (msg == EQUIP_ERR_OK)
        {
            WorldPackets::Item::ReadItemResultOK packet;
            packet.Item = item->GetGUID();
            SendPacket(packet.Write());

            TC_LOG_INFO("network", "STORAGE: Item page sent");
        }
        else
        {
            /// @todo: 6.x research new values
            /*WorldPackets::Item::ReadItemResultFailed packet;
            packet.Item = item->GetGUID();
            packet.Subcode = ??;
            packet.Delay = ??;
            SendPacket(packet.Write());*/

            TC_LOG_INFO("network", "STORAGE: Unable to read item");
            _player->SendEquipError(msg, item, NULL);
        }
    }
    else
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, NULL, NULL);
}

void WorldSession::HandleSellItemOpcode(WorldPackets::Item::SellItem& packet)
{
    TC_LOG_DEBUG("network", "WORLD: Received CMSG_SELL_ITEM: Vendor %s, Item %s, Amount: %u",
        packet.VendorGUID.ToString().c_str(), packet.ItemGUID.ToString().c_str(), packet.Amount);

    if (packet.ItemGUID.IsEmpty())
        return;

    Creature* creature = GetPlayer()->GetNPCIfCanInteractWith(packet.VendorGUID, UNIT_NPC_FLAG_VENDOR);
    if (!creature)
    {
        TC_LOG_DEBUG("network", "WORLD: HandleSellItemOpcode - %s not found or you can not interact with him.", packet.VendorGUID.ToString().c_str());
        _player->SendSellError(SELL_ERR_CANT_FIND_VENDOR, nullptr, packet.ItemGUID);
        return;
    }

    // remove fake death
    if (GetPlayer()->HasUnitState(UNIT_STATE_DIED))
        GetPlayer()->RemoveAurasByType(SPELL_AURA_FEIGN_DEATH);

    Item* pItem = _player->GetItemByGuid(packet.ItemGUID);
    if (pItem)
    {
        // prevent sell not owner item
        if (_player->GetGUID() != pItem->GetOwnerGUID())
        {
            _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
            return;
        }

        // prevent sell non empty bag by drag-and-drop at vendor's item list
        if (pItem->IsNotEmptyBag())
        {
            _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
            return;
        }

        // prevent sell currently looted item
        if (_player->GetLootGUID() == pItem->GetGUID())
        {
            _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
            return;
        }

        // prevent selling item for sellprice when the item is still refundable
        // this probably happens when right clicking a refundable item, the client sends both
        // CMSG_SELL_ITEM and CMSG_REFUND_ITEM (unverified)
        if (pItem->HasFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_REFUNDABLE))
            return; // Therefore, no feedback to client

        // special case at auto sell (sell all)
        if (packet.Amount == 0)
            packet.Amount = pItem->GetCount();
        else
        {
            // prevent sell more items that exist in stack (possible only not from client)
            if (packet.Amount > pItem->GetCount())
            {
                _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
                return;
            }
        }

        ItemTemplate const* pProto = pItem->GetTemplate();
        if (pProto)
        {
            if (pProto->GetSellPrice() > 0)
            {
                uint64 money = uint64(pProto->GetSellPrice()) * packet.Amount;

                if (!_player->ModifyMoney(money)) // ensure player doesn't exceed gold limit
                {
                    _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
                    return;
                }

                _player->UpdateCriteria(CRITERIA_TYPE_MONEY_FROM_VENDORS, money);

                if (packet.Amount < pItem->GetCount())               // need split items
                {
                    Item* pNewItem = pItem->CloneItem(packet.Amount, _player);
                    if (!pNewItem)
                    {
                        TC_LOG_ERROR("network", "WORLD: HandleSellItemOpcode - could not create clone of item %u; count = %u", pItem->GetEntry(), packet.Amount);
                        _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
                        return;
                    }

                    pItem->SetCount(pItem->GetCount() - packet.Amount);
                    _player->ItemRemovedQuestCheck(pItem->GetEntry(), packet.Amount);
                    if (_player->IsInWorld())
                        pItem->SendUpdateToPlayer(_player);
                    pItem->SetState(ITEM_CHANGED, _player);

                    _player->AddItemToBuyBackSlot(pNewItem);
                    if (_player->IsInWorld())
                        pNewItem->SendUpdateToPlayer(_player);
                }
                else
                {
                    _player->ItemRemovedQuestCheck(pItem->GetEntry(), pItem->GetCount());
                    _player->RemoveItem(pItem->GetBagSlot(), pItem->GetSlot(), true);
                    RemoveItemFromUpdateQueueOf(pItem, _player);
                    _player->AddItemToBuyBackSlot(pItem);
                }
            }
            else
                _player->SendSellError(SELL_ERR_CANT_SELL_ITEM, creature, packet.ItemGUID);
            return;
        }
    }
    _player->SendSellError(SELL_ERR_CANT_FIND_ITEM, creature, packet.ItemGUID);
    return;
}

void WorldSession::HandleBuybackItem(WorldPackets::Item::BuyBackItem& packet)
{
    TC_LOG_DEBUG("network", "WORLD: Received CMSG_BUYBACK_ITEM: Vendor %s, Slot: %u", packet.VendorGUID.ToString().c_str(), packet.Slot);

    Creature* creature = GetPlayer()->GetNPCIfCanInteractWith(packet.VendorGUID, UNIT_NPC_FLAG_VENDOR);
    if (!creature)
    {
        TC_LOG_DEBUG("network", "WORLD: HandleBuybackItem - Unit (%s) not found or you can not interact with him.", packet.VendorGUID.ToString().c_str());
        _player->SendSellError(SELL_ERR_CANT_FIND_VENDOR, NULL, ObjectGuid::Empty);
        return;
    }

    // remove fake death
    if (GetPlayer()->HasUnitState(UNIT_STATE_DIED))
        GetPlayer()->RemoveAurasByType(SPELL_AURA_FEIGN_DEATH);

    Item* pItem = _player->GetItemFromBuyBackSlot(packet.Slot);
    if (pItem)
    {
        uint32 price = _player->GetUInt32Value(ACTIVE_PLAYER_FIELD_BUYBACK_PRICE + packet.Slot - BUYBACK_SLOT_START);
        if (!_player->HasEnoughMoney(uint64(price)))
        {
            _player->SendBuyError(BUY_ERR_NOT_ENOUGHT_MONEY, creature, pItem->GetEntry(), 0);
            return;
        }

        ItemPosCountVec dest;
        InventoryResult msg = _player->CanStoreItem(NULL_BAG, NULL_SLOT, dest, pItem, false);
        if (msg == EQUIP_ERR_OK)
        {
            _player->ModifyMoney(-(int32)price);
            _player->RemoveItemFromBuyBackSlot(packet.Slot, false);
            _player->MoveItemToInventory(dest, pItem, true);
        }
        else
            _player->SendEquipError(msg, pItem, NULL);
        return;
    }
    else
        _player->SendBuyError(BUY_ERR_CANT_FIND_ITEM, creature, 0, 0);
}

void WorldSession::HandleBuyItemOpcode(WorldPackets::Item::BuyItem& packet)
{
    // client expects count starting at 1, and we send vendorslot+1 to client already
    if (packet.Muid > 0)
        --packet.Muid;
    else
        return; // cheating

    switch (packet.ItemType)
    {
        case ITEM_VENDOR_TYPE_ITEM:
        {
            Item* bagItem = _player->GetItemByGuid(packet.ContainerGUID);

            uint8 bag = NULL_BAG;
            if (bagItem && bagItem->IsBag())
                bag = bagItem->GetSlot();
            else if (packet.ContainerGUID == GetPlayer()->GetGUID()) // The client sends the player guid when trying to store an item in the default backpack
                bag = INVENTORY_SLOT_BAG_0;

            GetPlayer()->BuyItemFromVendorSlot(packet.VendorGUID, packet.Muid, packet.Item.ItemID,
                packet.Quantity, bag, packet.Slot);
            break;
        }
        case ITEM_VENDOR_TYPE_CURRENCY:
        {
            GetPlayer()->BuyCurrencyFromVendorSlot(packet.VendorGUID, packet.Muid, packet.Item.ItemID, packet.Quantity);
            break;
        }
        default:
        {
            TC_LOG_DEBUG("network", "WORLD: received wrong itemType (%u) in HandleBuyItemOpcode", packet.ItemType);
            break;
        }
    }
}

void WorldSession::HandleListInventoryOpcode(WorldPackets::NPC::Hello& packet)
{
    if (!GetPlayer()->IsAlive())
        return;

    SendListInventory(packet.Unit);
}

void WorldSession::SendListInventory(ObjectGuid vendorGuid)
{
    Creature* vendor = GetPlayer()->GetNPCIfCanInteractWith(vendorGuid, UNIT_NPC_FLAG_VENDOR);
    if (!vendor)
    {
        TC_LOG_DEBUG("network", "WORLD: SendListInventory - %s not found or you can not interact with him.", vendorGuid.ToString().c_str());
        _player->SendSellError(SELL_ERR_CANT_FIND_VENDOR, NULL, ObjectGuid::Empty);
        return;
    }

    // remove fake death
    if (GetPlayer()->HasUnitState(UNIT_STATE_DIED))
        GetPlayer()->RemoveAurasByType(SPELL_AURA_FEIGN_DEATH);

    // Stop the npc if moving
    if (vendor->HasUnitState(UNIT_STATE_MOVING))
        vendor->StopMoving();

    VendorItemData const* vendorItems = vendor->GetVendorItems();
    uint32 rawItemCount = vendorItems ? vendorItems->GetItemCount() : 0;

    WorldPackets::NPC::VendorInventory packet;
    packet.Vendor = vendor->GetGUID();

    packet.Items.resize(rawItemCount);

    const float discountMod = _player->GetReputationPriceDiscount(vendor);
    uint8 count = 0;
    for (uint32 slot = 0; slot < rawItemCount; ++slot)
    {
        VendorItem const* vendorItem = vendorItems->GetItem(slot);
        if (!vendorItem)
            continue;

        WorldPackets::NPC::VendorItem& item = packet.Items[count];

        if (PlayerConditionEntry const* playerCondition = sPlayerConditionStore.LookupEntry(vendorItem->PlayerConditionId))
            if (!ConditionMgr::IsPlayerMeetingCondition(_player, playerCondition))
                item.PlayerConditionFailed = playerCondition->ID;

        if (vendorItem->Type == ITEM_VENDOR_TYPE_ITEM)
        {
            ItemTemplate const* itemTemplate = sObjectMgr->GetItemTemplate(vendorItem->item);
            if (!itemTemplate)
                continue;

            int32 leftInStock = !vendorItem->maxcount ? -1 : vendor->GetVendorItemCurrentCount(vendorItem);
            if (!_player->IsGameMaster()) // ignore conditions if GM on
            {
                // Respect allowed class
                if (!(itemTemplate->GetAllowableClass() & _player->getClassMask()) && itemTemplate->GetBonding() == BIND_ON_ACQUIRE)
                    continue;

                // Only display items in vendor lists for the team the player is on
                if ((itemTemplate->GetFlags2() & ITEM_FLAG2_FACTION_HORDE && _player->GetTeam() == ALLIANCE) ||
                    (itemTemplate->GetFlags2() & ITEM_FLAG2_FACTION_ALLIANCE && _player->GetTeam() == HORDE))
                    continue;

                // Items sold out are not displayed in list
                if (leftInStock == 0)
                    continue;
            }

            if (!sConditionMgr->IsObjectMeetingVendorItemConditions(vendor->GetEntry(), vendorItem->item, _player, vendor))
            {
                TC_LOG_DEBUG("condition", "SendListInventory: conditions not met for creature entry %u item %u", vendor->GetEntry(), vendorItem->item);
                continue;
            }

            int32 price = vendorItem->IsGoldRequired(itemTemplate) ? uint32(floor(itemTemplate->GetBuyPrice() * discountMod)) : 0;

            if (int32 priceMod = _player->GetTotalAuraModifier(SPELL_AURA_MOD_VENDOR_ITEMS_PRICES))
                price -= CalculatePct(price, priceMod);

            item.MuID = slot + 1; // client expects counting to start at 1
            item.Durability = itemTemplate->MaxDurability;
            item.ExtendedCostID = vendorItem->ExtendedCost;
            item.Type = vendorItem->Type;
            item.Quantity = leftInStock;
            item.StackCount = itemTemplate->GetBuyCount();
            item.Price = price;
            item.DoNotFilterOnVendor = vendorItem->IgnoreFiltering;

            item.Item.ItemID = vendorItem->item;
            if (!vendorItem->BonusListIDs.empty())
            {
                item.Item.ItemBonus = boost::in_place();
                item.Item.ItemBonus->BonusListIDs = vendorItem->BonusListIDs;
            }
        }
        else if (vendorItem->Type == ITEM_VENDOR_TYPE_CURRENCY)
        {
            CurrencyTypesEntry const* currencyTemplate = sCurrencyTypesStore.LookupEntry(vendorItem->item);
            if (!currencyTemplate)
                continue;

            if (!vendorItem->ExtendedCost)
                continue; // there's no price defined for currencies, only extendedcost is used

            item.MuID = slot + 1; // client expects counting to start at 1
            item.ExtendedCostID = vendorItem->ExtendedCost;
            item.Item.ItemID = vendorItem->item;
            item.Type = vendorItem->Type;
            item.StackCount = vendorItem->maxcount;
            item.DoNotFilterOnVendor = vendorItem->IgnoreFiltering;
        }
        else
            continue;

        if (++count >= MAX_VENDOR_ITEMS)
            break;
    }

    // Resize vector to real size (some items can be skipped due to checks)
    packet.Items.resize(count);

    SendPacket(packet.Write());
}

void WorldSession::HandleAutoStoreBagItemOpcode(WorldPackets::Item::AutoStoreBagItem& packet)
{
    if (!packet.Inv.Items.empty())
    {
        TC_LOG_ERROR("network", "HandleAutoStoreBagItemOpcode - Invalid itemCount (" SZFMTD ")", packet.Inv.Items.size());
        return;
    }

    TC_LOG_DEBUG("network", "HandleAutoStoreBagItemOpcode: receive ContainerSlotA: %u, SlotA: %u, ContainerSlotB: %u",
        packet.ContainerSlotA, packet.SlotA, packet.ContainerSlotB);

    Item* item = _player->GetItemByPos(packet.ContainerSlotA, packet.SlotA);
    if (!item)
        return;

    if (!_player->IsValidPos(packet.ContainerSlotB, NULL_SLOT, false))      // can be autostore pos
    {
        _player->SendEquipError(EQUIP_ERR_WRONG_SLOT);
        return;
    }

    uint16 src = item->GetPos();

    // check unequip potability for equipped items and bank bags
    if (_player->IsEquipmentPos(src) || _player->IsBagPos(src))
    {
        InventoryResult msg = _player->CanUnequipItem(src, !_player->IsBagPos(src));
        if (msg != EQUIP_ERR_OK)
        {
            _player->SendEquipError(msg, item);
            return;
        }
    }

    ItemPosCountVec dest;
    InventoryResult msg = _player->CanStoreItem(packet.ContainerSlotB, NULL_SLOT, dest, item, false);
    if (msg != EQUIP_ERR_OK)
    {
        _player->SendEquipError(msg, item);
        return;
    }

    // no-op: placed in same slot
    if (dest.size() == 1 && dest[0].pos == src)
    {
        // just remove grey item state
        _player->SendEquipError(EQUIP_ERR_INTERNAL_BAG_ERROR, item);
        return;
    }

    _player->RemoveItem(packet.ContainerSlotA, packet.SlotA, true);
    _player->StoreItem(dest, item, true);
}

void WorldSession::SendEnchantmentLog(ObjectGuid target, ObjectGuid caster, uint32 itemId, uint32 enchantId)
{
    WorldPacket data(SMSG_ENCHANTMENT_LOG, (8+8+4+4));
    data << target;
    data << caster;
    data << uint32(itemId);
    data << uint32(enchantId);
    GetPlayer()->SendMessageToSet(&data, true);
}

void WorldSession::SendItemEnchantTimeUpdate(ObjectGuid Playerguid, ObjectGuid Itemguid, uint32 slot, uint32 Duration)
{
    WorldPackets::Item::ItemEnchantTimeUpdate data;
    data.ItemGuid = Itemguid;
    data.DurationLeft = Duration;
    data.Slot = slot;
    data.OwnerGuid = Playerguid;
    SendPacket(data.Write());
}

void WorldSession::HandleWrapItem(WorldPackets::Item::WrapItem& packet)
{
    if (packet.Inv.Items.size() != 2)
    {
        TC_LOG_ERROR("network", "HandleWrapItem - Invalid itemCount (" SZFMTD ")", packet.Inv.Items.size());
        return;
    }

    /// @todo: 6.x find better way for read
    // Gift
    uint8 giftContainerSlot = packet.Inv.Items[0].ContainerSlot;
    uint8 giftSlot          = packet.Inv.Items[0].Slot;
    // Item
    uint8 itemContainerSlot = packet.Inv.Items[1].ContainerSlot;
    uint8 itemSlot          = packet.Inv.Items[1].Slot;

    TC_LOG_DEBUG("network", "HandleWrapItem - Receive giftContainerSlot = %u, giftSlot = %u, itemContainerSlot = %u, itemSlot = %u", giftContainerSlot, giftSlot, itemContainerSlot, itemSlot);

    Item* gift = _player->GetItemByPos(giftContainerSlot, giftSlot);
    if (!gift)
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, gift, NULL);
        return;
    }

    if (!(gift->GetTemplate()->GetFlags() & ITEM_FLAG_IS_WRAPPER)) // cheating: non-wrapper wrapper
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, gift, NULL);
        return;
    }

    Item* item = _player->GetItemByPos(itemContainerSlot, itemSlot);
    if (!item)
    {
        _player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, item, NULL);
        return;
    }

    if (item == gift) // not possable with pacjket from real client
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_WRAPPED, item, NULL);
        return;
    }

    if (item->IsEquipped())
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_EQUIPPED, item, NULL);
        return;
    }

    if (!item->GetGuidValue(ITEM_FIELD_GIFTCREATOR).IsEmpty()) // HasFlag(ITEM_FIELD_FLAGS, ITEM_FLAGS_WRAPPED);
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_WRAPPED, item, NULL);
        return;
    }

    if (item->IsBag())
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_BAGS, item, NULL);
        return;
    }

    if (item->IsSoulBound())
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_BOUND, item, NULL);
        return;
    }

    if (item->GetMaxStackCount() != 1)
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_STACKABLE, item, NULL);
        return;
    }

    // maybe not correct check  (it is better than nothing)
    if (item->GetTemplate()->GetMaxCount() > 0)
    {
        _player->SendEquipError(EQUIP_ERR_CANT_WRAP_UNIQUE, item, NULL);
        return;
    }

    SQLTransaction trans = CharacterDatabase.BeginTransaction();

    PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_CHAR_GIFT);
    stmt->setUInt64(0, item->GetOwnerGUID().GetCounter());
    stmt->setUInt64(1, item->GetGUID().GetCounter());
    stmt->setUInt32(2, item->GetEntry());
    stmt->setUInt32(3, item->GetUInt32Value(ITEM_FIELD_FLAGS));
    trans->Append(stmt);

    item->SetEntry(gift->GetEntry());

    switch (item->GetEntry())
    {
        case 5042:
            item->SetEntry(5043);
            break;
        case 5048:
            item->SetEntry(5044);
            break;
        case 17303:
            item->SetEntry(17302);
            break;
        case 17304:
            item->SetEntry(17305);
            break;
        case 17307:
            item->SetEntry(17308);
            break;
        case 21830:
            item->SetEntry(21831);
            break;
    }

    item->SetGuidValue(ITEM_FIELD_GIFTCREATOR, _player->GetGUID());
    item->SetUInt32Value(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_WRAPPED);
    item->SetState(ITEM_CHANGED, _player);

    if (item->GetState() == ITEM_NEW) // save new item, to have alway for `character_gifts` record in `item_instance`
    {
        // after save it will be impossible to remove the item from the queue
        RemoveItemFromUpdateQueueOf(item, _player);
        item->SaveToDB(trans); // item gave inventory record unchanged and can be save standalone
    }
    CharacterDatabase.CommitTransaction(trans);

    uint32 count = 1;
    _player->DestroyItemCount(gift, count, true);
}

void WorldSession::HandleSocketGems(WorldPackets::Item::SocketGems& socketGems)
{
    if (!socketGems.ItemGuid)
        return;

    //cheat -> tried to socket same gem multiple times
    if ((!socketGems.GemItem[0].IsEmpty() && (socketGems.GemItem[0] == socketGems.GemItem[1] || socketGems.GemItem[0] == socketGems.GemItem[2])) ||
        (!socketGems.GemItem[1].IsEmpty() && (socketGems.GemItem[1] == socketGems.GemItem[2])))
        return;

    Item* itemTarget = _player->GetItemByGuid(socketGems.ItemGuid);
    if (!itemTarget)                                         //missing item to socket
        return;

    ItemTemplate const* itemProto = itemTarget->GetTemplate();
    if (!itemProto)
        return;

    //this slot is excepted when applying / removing meta gem bonus
    uint8 slot = itemTarget->IsEquipped() ? itemTarget->GetSlot() : uint8(NULL_SLOT);

    Item* gems[MAX_GEM_SOCKETS];
    memset(gems, 0, sizeof(gems));
    ItemDynamicFieldGems gemData[MAX_GEM_SOCKETS];
    memset(gemData, 0, sizeof(gemData));
    GemPropertiesEntry const* gemProperties[MAX_GEM_SOCKETS];
    memset(gemProperties, 0, sizeof(gemProperties));
    ItemDynamicFieldGems const* oldGemData[MAX_GEM_SOCKETS];
    memset(oldGemData, 0, sizeof(oldGemData));
    for (uint32 i = 0; i < MAX_GEM_SOCKETS; ++i)
    {
        if (Item* gem = _player->GetItemByGuid(socketGems.GemItem[i]))
        {
            gems[i] = gem;
            gemData[i].ItemId = gem->GetEntry();
            gemData[i].Context = gem->GetUInt32Value(ITEM_FIELD_CONTEXT);
            for (std::size_t b = 0; b < gem->GetDynamicValues(ITEM_DYNAMIC_FIELD_BONUSLIST_IDS).size() && b < 16; ++b)
                gemData[i].BonusListIDs[b] = gem->GetDynamicValue(ITEM_DYNAMIC_FIELD_BONUSLIST_IDS, b);

            gemProperties[i] = sGemPropertiesStore.LookupEntry(gem->GetTemplate()->GetGemProperties());
        }

        oldGemData[i] = itemTarget->GetGem(i);
    }

    // Find first prismatic socket
    uint32 firstPrismatic = 0;
    while (firstPrismatic < MAX_GEM_SOCKETS && itemTarget->GetSocketColor(firstPrismatic))
        ++firstPrismatic;

    for (uint32 i = 0; i < MAX_GEM_SOCKETS; ++i)                //check for hack maybe
    {
        if (!gemProperties[i])
            continue;

        // tried to put gem in socket where no socket exists (take care about prismatic sockets)
        if (!itemTarget->GetSocketColor(i))
        {
            // no prismatic socket
            if (!itemTarget->GetEnchantmentId(PRISMATIC_ENCHANTMENT_SLOT))
                return;

            if (i != firstPrismatic)
                return;
        }

        // Gem must match socket color
        if (SocketColorToGemTypeMask[itemTarget->GetSocketColor(i)] != gemProperties[i]->Type)
        {
            // unless its red, blue, yellow or prismatic
            if (!(SocketColorToGemTypeMask[itemTarget->GetSocketColor(i)] & SOCKET_COLOR_PRISMATIC) || !(gemProperties[i]->Type & SOCKET_COLOR_PRISMATIC))
                return;
        }
    }

    // check unique-equipped conditions
    for (uint32 i = 0; i < MAX_GEM_SOCKETS; ++i)
    {
        if (!gems[i])
            continue;

        // continue check for case when attempt add 2 similar unique equipped gems in one item.
        ItemTemplate const* iGemProto = gems[i]->GetTemplate();

        // unique item (for new and already placed bit removed enchantments
        if (iGemProto->GetFlags() & ITEM_FLAG_UNIQUE_EQUIPPABLE)
        {
            for (uint32 j = 0; j < MAX_GEM_SOCKETS; ++j)
            {
                if (i == j)                                    // skip self
                    continue;

                if (gems[j])
                {
                    if (iGemProto->GetId() == gems[j]->GetEntry())
                    {
                        _player->SendEquipError(EQUIP_ERR_ITEM_UNIQUE_EQUIPPABLE_SOCKETED, itemTarget, NULL);
                        return;
                    }
                }
                else if (oldGemData[j])
                {
                    if (iGemProto->GetId() == oldGemData[j]->ItemId)
                    {
                        _player->SendEquipError(EQUIP_ERR_ITEM_UNIQUE_EQUIPPABLE_SOCKETED, itemTarget, NULL);
                        return;
                    }
                }
            }
        }

        // unique limit type item
        int32 limit_newcount = 0;
        if (iGemProto->GetItemLimitCategory())
        {
            if (ItemLimitCategoryEntry const* limitEntry = sItemLimitCategoryStore.LookupEntry(iGemProto->GetItemLimitCategory()))
            {
                // NOTE: limitEntry->mode is not checked because if item has limit then it is applied in equip case
                for (int j = 0; j < MAX_GEM_SOCKETS; ++j)
                {
                    if (gems[j])
                    {
                        // new gem
                        if (iGemProto->GetItemLimitCategory() == gems[j]->GetTemplate()->GetItemLimitCategory())
                            ++limit_newcount;
                    }
                    else if (oldGemData[j])
                    {
                        // existing gem
                        if (ItemTemplate const* jProto = sObjectMgr->GetItemTemplate(oldGemData[j]->ItemId))
                            if (iGemProto->GetItemLimitCategory() == jProto->GetItemLimitCategory())
                                ++limit_newcount;
                    }
                }

                if (limit_newcount > 0 && uint32(limit_newcount) > _player->GetItemLimitCategoryQuantity(limitEntry))
                {
                    _player->SendEquipError(EQUIP_ERR_ITEM_UNIQUE_EQUIPPABLE_SOCKETED, itemTarget, NULL);
                    return;
                }
            }
        }

        // for equipped item check all equipment for duplicate equipped gems
        if (itemTarget->IsEquipped())
        {
            if (InventoryResult res = _player->CanEquipUniqueItem(gems[i], slot, std::max(limit_newcount, 0)))
            {
                _player->SendEquipError(res, itemTarget, NULL);
                return;
            }
        }
    }

    bool SocketBonusActivated = itemTarget->GemsFitSockets();    //save state of socketbonus
    _player->ToggleMetaGemsActive(slot, false);             //turn off all metagems (except for the target item)

    //if a meta gem is being equipped, all information has to be written to the item before testing if the conditions for the gem are met

    //remove ALL mods - gem can change item level
    if (itemTarget->IsEquipped())
        _player->_ApplyItemMods(itemTarget, itemTarget->GetSlot(), false);

    for (uint16 i = 0; i < MAX_GEM_SOCKETS; ++i)
    {
        if (gems[i])
        {
            uint32 gemScalingLevel = _player->getLevel();
            if (uint32 fixedLevel = gems[i]->GetModifier(ITEM_MODIFIER_SCALING_STAT_DISTRIBUTION_FIXED_LEVEL))
                gemScalingLevel = fixedLevel;

            itemTarget->SetGem(i, &gemData[i], gemScalingLevel);

            if (gemProperties[i] && gemProperties[i]->EnchantId)
                itemTarget->SetEnchantment(EnchantmentSlot(SOCK_ENCHANTMENT_SLOT + i), gemProperties[i]->EnchantId, 0, 0, _player->GetGUID());

            uint32 gemCount = 1;
            _player->DestroyItemCount(gems[i], gemCount, true);
        }
    }

    if (itemTarget->IsEquipped())
        _player->_ApplyItemMods(itemTarget, itemTarget->GetSlot(), true);

    if (Item* childItem = _player->GetChildItemByGuid(itemTarget->GetChildItem()))
    {
        if (childItem->IsEquipped())
            _player->_ApplyItemMods(childItem, childItem->GetSlot(), false);
        childItem->CopyArtifactDataFromParent(itemTarget);
        if (childItem->IsEquipped())
            _player->_ApplyItemMods(childItem, childItem->GetSlot(), true);
    }

    bool SocketBonusToBeActivated = itemTarget->GemsFitSockets();//current socketbonus state
    if (SocketBonusActivated ^ SocketBonusToBeActivated)     //if there was a change...
    {
        _player->ApplyEnchantment(itemTarget, BONUS_ENCHANTMENT_SLOT, false);
        itemTarget->SetEnchantment(BONUS_ENCHANTMENT_SLOT, (SocketBonusToBeActivated ? itemTarget->GetTemplate()->GetSocketBonus() : 0), 0, 0, _player->GetGUID());
        _player->ApplyEnchantment(itemTarget, BONUS_ENCHANTMENT_SLOT, true);
        //it is not displayed, client has an inbuilt system to determine if the bonus is activated
    }

    _player->ToggleMetaGemsActive(slot, true);              //turn on all metagems (except for target item)

    _player->RemoveTradeableItem(itemTarget);
    itemTarget->ClearSoulboundTradeable(_player);           // clear tradeable flag

    itemTarget->SendUpdateSockets();
}

void WorldSession::HandleCancelTempEnchantmentOpcode(WorldPackets::Item::CancelTempEnchantment& cancelTempEnchantment)
{
    // apply only to equipped item
    if (!Player::IsEquipmentPos(INVENTORY_SLOT_BAG_0, cancelTempEnchantment.Slot))
        return;

    Item* item = GetPlayer()->GetItemByPos(INVENTORY_SLOT_BAG_0, cancelTempEnchantment.Slot);

    if (!item)
        return;

    if (!item->GetEnchantmentId(TEMP_ENCHANTMENT_SLOT))
        return;

    GetPlayer()->ApplyEnchantment(item, TEMP_ENCHANTMENT_SLOT, false);
    item->ClearEnchantment(TEMP_ENCHANTMENT_SLOT);
}

void WorldSession::HandleGetItemPurchaseData(WorldPackets::Item::GetItemPurchaseData& packet)
{
    Item* item = _player->GetItemByGuid(packet.ItemGUID);
    if (!item)
    {
        TC_LOG_DEBUG("network", "HandleGetItemPurchaseData: Item %s not found!", packet.ItemGUID.ToString().c_str());
        return;
    }

    TC_LOG_DEBUG("network", "HandleGetItemPurchaseData: Item %s", packet.ItemGUID.ToString().c_str());

    GetPlayer()->SendRefundInfo(item);
}

void WorldSession::HandleItemRefund(WorldPackets::Item::ItemPurchaseRefund& packet)
{
    Item* item = _player->GetItemByGuid(packet.ItemGUID);
    if (!item)
    {
        TC_LOG_DEBUG("network", "WorldSession::HandleItemRefund: Item (%s) not found!", packet.ItemGUID.ToString().c_str());
        return;
    }

    // Don't try to refund item currently being disenchanted
    if (_player->GetLootGUID() == packet.ItemGUID)
        return;

    GetPlayer()->RefundItem(item);
}

bool WorldSession::CanUseBank(ObjectGuid bankerGUID) const
{
    // bankerGUID parameter is optional, set to 0 by default.
    if (!bankerGUID)
        bankerGUID = m_currentBankerGUID;

    bool isUsingBankCommand = (bankerGUID == GetPlayer()->GetGUID() && bankerGUID == m_currentBankerGUID);

    if (!isUsingBankCommand)
    {
        Creature* creature = GetPlayer()->GetNPCIfCanInteractWith(bankerGUID, UNIT_NPC_FLAG_BANKER);
        if (!creature)
            return false;
    }

    return true;
}

void WorldSession::HandleUseCritterItem(WorldPackets::Item::UseCritterItem& useCritterItem)
{
    Item* item = _player->GetItemByGuid(useCritterItem.ItemGuid);
    if (!item)
        return;

    if (item->GetTemplate()->Effects.size() < 2)
        return;

    int32 spellToLearn = item->GetTemplate()->Effects[1]->SpellID;
    for (BattlePetSpeciesEntry const* entry : sBattlePetSpeciesStore)
    {
        if (entry->SummonSpellID == spellToLearn)
        {
            GetBattlePetMgr()->AddPet(entry->ID, entry->CreatureID, BattlePetMgr::RollPetBreed(entry->ID), BattlePetMgr::GetDefaultPetQuality(entry->ID));
            _player->UpdateCriteria(CRITERIA_TYPE_OWN_BATTLE_PET_COUNT);
            break;
        }
    }

    _player->DestroyItem(item->GetBagSlot(), item->GetSlot(), true);
}

void WorldSession::HandleUpgradeItem(WorldPackets::Item::UpgradeItem& upgradeItem)
{
    WorldPackets::Item::ItemUpgradeResult itemUpgradeResult;
    if (!_player->GetNPCIfCanInteractWith(upgradeItem.ItemMaster, UNIT_NPC_FLAG_ITEM_UPGRADE_MASTER))
    {
        TC_LOG_DEBUG("network", "WORLD: HandleUpgradeItems - %s not found or player can't interact with it.", upgradeItem.ItemMaster.ToString().c_str());
        itemUpgradeResult.Success = false;
        SendPacket(itemUpgradeResult.Write());
        return;
    }

    Item* item = _player->GetItemByGuid(upgradeItem.ItemGUID);
    if (!item)
    {
        TC_LOG_DEBUG("network", "WORLD: HandleUpgradeItems: Item %s not found!", upgradeItem.ItemGUID.ToString().c_str());
        itemUpgradeResult.Success = false;
        SendPacket(itemUpgradeResult.Write());
        return;
    }

    ItemUpgradeEntry const* itemUpgradeEntry = sItemUpgradeStore.LookupEntry(upgradeItem.UpgradeID);
    if (!itemUpgradeEntry)
    {
        TC_LOG_DEBUG("network", "WORLD: HandleUpgradeItems - ItemUpgradeEntry (%u) not found.", upgradeItem.UpgradeID);
        itemUpgradeResult.Success = false;
        SendPacket(itemUpgradeResult.Write());
        return;
    }

    // Check if player has enough currency
    if (!_player->HasCurrency(itemUpgradeEntry->CurrencyType, itemUpgradeEntry->CurrencyAmount))
    {
        TC_LOG_DEBUG("network", "WORLD: HandleUpgradeItems - Player has not enougth currency (ID: %u, Cost: %u) not found.", itemUpgradeEntry->CurrencyType, itemUpgradeEntry->CurrencyAmount);
        itemUpgradeResult.Success = false;
        SendPacket(itemUpgradeResult.Write());
        return;
    }

    uint32 currentUpgradeId = item->GetModifier(ITEM_MODIFIER_UPGRADE_ID);
    if (currentUpgradeId != itemUpgradeEntry->PrerequisiteID)
    {
        TC_LOG_DEBUG("network", "WORLD: HandleUpgradeItems - ItemUpgradeEntry (%u) is not related to this ItemUpgradePath (%u).", itemUpgradeEntry->ID, currentUpgradeId);
        itemUpgradeResult.Success = false;
        SendPacket(itemUpgradeResult.Write());
        return;
    }

    itemUpgradeResult.Success = true;
    SendPacket(itemUpgradeResult.Write());

    if (item->IsEquipped())
        _player->_ApplyItemBonuses(item, item->GetSlot(), false);

    item->SetModifier(ITEM_MODIFIER_UPGRADE_ID, itemUpgradeEntry->ID);

    if (item->IsEquipped())
        _player->_ApplyItemBonuses(item, item->GetSlot(), true);

    item->SetState(ITEM_CHANGED, _player);
    _player->ModifyCurrency(itemUpgradeEntry->CurrencyType, -int32(itemUpgradeEntry->CurrencyAmount));
}

void WorldSession::HandleSortBags(WorldPackets::Item::SortBags& /*sortBags*/)
{
    // TODO: Implement sorting
    // Placeholder to prevent completely locking out bags clientside
    SendPacket(WorldPackets::Item::SortBagsResult().Write());
}

void WorldSession::HandleSortBankBags(WorldPackets::Item::SortBankBags& /*sortBankBags*/)
{
    // TODO: Implement sorting
    // Placeholder to prevent completely locking out bags clientside
    SendPacket(WorldPackets::Item::SortBagsResult().Write());
}

void WorldSession::HandleSortReagentBankBags(WorldPackets::Item::SortReagentBankBags& /*sortReagentBankBags*/)
{
    // TODO: Implement sorting
    // Placeholder to prevent completely locking out bags clientside
    SendPacket(WorldPackets::Item::SortBagsResult().Write());
}

void WorldSession::HandleRemoveNewItem(WorldPackets::Item::RemoveNewItem& removeNewItem)
{
    Item* item = _player->GetItemByGuid(removeNewItem.ItemGuid);
    if (!item)
    {
        TC_LOG_DEBUG("network", "WorldSession::HandleRemoveNewItem: Item (%s) not found for %s!", removeNewItem.ItemGuid.ToString().c_str(), GetPlayerInfo().c_str());
        return;
    }

    if (item->HasFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_NEW_ITEM))
    {
        item->RemoveFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_NEW_ITEM);
        item->SetState(ITEM_CHANGED, _player);
    }
}
